Let we weight for their discussion but on my side there is no freedom to have new constitution. What they protect is the whims of president if we want to have the strong government let our government controlled and guided by parliament and not executive as you have said that the President has the power to form the commission because president can mention the people who can protect the whims of ruling party and himself as president.
The good constitution should be made by freedom of expression without restriction that people who curtail their power to the president are not required to discuss that power that is not freedom in my mind i create alot of question why people are voting if they dont have freedom to discuss the power of the person they vote to.